Thanks for downloading the shaders! I believe some of these issues might be something to do with the later versions of URP - these assets were created with 7.1.8 - and I've just had a nightmare of a time trying to get the effects to work myself, but I think many of the isses can be solved by changing the Render Pass Event variable of each effect to "Before Rendering Post Processing".
That said, the Dither effect in particular is still broken and has that strange infinite loop you mention. Thanks for bringing it to my attention - I don't know what's causing it yet, but I'll investigate asap. The other effects that have that loop bug are Fancy Neon, Fancy Outline, Sobel Neon and Sobel Outline.
I hope that fixes some of the problems!